Book sale: 11 a.m. to 4 p.m. Book Cellar, Central Library, 600 Soledad St. Thousands of books for adults, children and teens, as well as music CDs and books on CD, all for 25 cents to $1. One hour free parking in library garage. Call 210-227-9519.

Saturday

Author appearance: 10 a.m. to noon. The Twig Book Shop at Pearl Brewery, 200 E. Grayson St. Ellise Pierce discusses and signs “Cowgirl Chef: Texas Cooking With a French Accent.”

Author appearance: 11 a.m. to 1 p.m. The Twig Book Shop at Pearl Brewery. John Green discusses and signs his self-help memoir “Headlights.”

Author appearance: 5 to 7 p.m. The Twig Book Shop at Pearl Brewery. Four-term San Antonio mayor and former Secretary of Housing and Urban DevelopmentHenry Cisneros discusses and signs “Independent for Life: Homes and Neighborhoods for an Aging America.”